Which exercise variation could be made more difficult by extending one foot backward during the eccentric phase?

Extending one foot backward during the eccentric phase of an exercise creates a greater demand on balance and stability, which effectively increases the difficulty of the movement. In the case of the asymmetrical Romanian deadlift, performing the exercise with one foot extended back enhances the activation of the glutes and hamstrings of the supporting leg while also requiring core stability to maintain balance. This variation forces the muscles of the standing leg to work harder against gravity, thereby increasing the challenge of the exercise.

The asymmetrical nature of this deadlift already places emphasis on aligning strength and control through one leg, and adding the backward foot extension during the eccentric phase further elevates the load and complexity. This can help to develop strength and stability in a single-leg position, making for a more intense workout targeting the posterior chain.